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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bpygpu
*
* This file defines the uniform buffer functionalities of the 'gpu' module
*
* - Use `bpygpu_` for local API.
* - Use `BPyGPU` for public API.
*/
#include <Python.h>
#include "BLI_string.h"
#include "GPU_context.h"
#include "GPU_uniform_buffer.h"
#include "../generic/py_capi_utils.h"
#include "gpu_py.h"
#include "gpu_py_uniformbuffer.h" /* own include */
/* -------------------------------------------------------------------- */
/** \name GPUUniformBuf Common Utilities
* \{ */
static int pygpu_uniformbuffer_valid_check(BPyGPUUniformBuf *bpygpu_ub)
{
if (UNLIKELY(bpygpu_ub->ubo == NULL)) {
PyErr_SetString(PyExc_ReferenceError,
#ifdef BPYGPU_USE_GPUOBJ_FREE_METHOD
"GPU uniform buffer was freed, no further access is valid");
#else
"GPU uniform buffer: internal error");
#endif
return -1;
}
return 0;
}
#define BPYGPU_UNIFORMBUF_CHECK_OBJ(bpygpu) \
{ \
if (UNLIKELY(pygpu_uniformbuffer_valid_check(bpygpu) == -1)) { \
return NULL; \
} \
} \
((void)0)
/** \} */
/* -------------------------------------------------------------------- */
/** \name GPUUniformBuf Type
* \{ */
static PyObject *pygpu_uniformbuffer__tp_new(PyTypeObject *UNUSED(self),
PyObject *args,
PyObject *kwds)
{
BPYGPU_IS_INIT_OR_ERROR_OBJ;
GPUUniformBuf *ubo = NULL;
PyObject *pybuffer_obj;
char err_out[256] = "unknown error. See console";
static const char *_keywords[] = {"data", NULL};
static _PyArg_Parser _parser = {
"O" /* `data` */
":GPUUniformBuf.__new__",
_keywords,
0,
};
if (!_PyArg_ParseTupleAndKeywordsFast(args, kwds, &_parser, &pybuffer_obj)) {
return NULL;
}
if (!GPU_context_active_get()) {
STRNCPY(err_out, "No active GPU context found");
}
else {
Py_buffer pybuffer;
if (PyObject_GetBuffer(pybuffer_obj, &pybuffer, PyBUF_SIMPLE) == -1) {
/* PyObject_GetBuffer raise a PyExc_BufferError */
return NULL;
}
if ((pybuffer.len % 16) != 0) {
STRNCPY(err_out, "UBO is not padded to size of vec4");
}
else {
ubo = GPU_uniformbuf_create_ex(pybuffer.len, pybuffer.buf, "python_uniformbuffer");
}
PyBuffer_Release(&pybuffer);
}
if (ubo == NULL) {
PyErr_Format(PyExc_RuntimeError, "GPUUniformBuf.__new__(...) failed with '%s'", err_out);
return NULL;
}
return BPyGPUUniformBuf_CreatePyObject(ubo);
}
PyDoc_STRVAR(pygpu_uniformbuffer_update_doc,
".. method:: update(data)\n"
"\n"
" Update the data of the uniform buffer object.\n");
static PyObject *pygpu_uniformbuffer_update(BPyGPUUniformBuf *self, PyObject *obj)
{
BPYGPU_UNIFORMBUF_CHECK_OBJ(self);
Py_buffer pybuffer;
if (PyObject_GetBuffer(obj, &pybuffer, PyBUF_SIMPLE) == -1) {
/* PyObject_GetBuffer raise a PyExc_BufferError */
return NULL;
}
GPU_uniformbuf_update(self->ubo, pybuffer.buf);
PyBuffer_Release(&pybuffer);
Py_RETURN_NONE;
}
#ifdef BPYGPU_USE_GPUOBJ_FREE_METHOD
PyDoc_STRVAR(pygpu_uniformbuffer_free_doc,
".. method::free()\n"
"\n"
" Free the uniform buffer object.\n"
" The uniform buffer object will no longer be accessible.\n");
static PyObject *pygpu_uniformbuffer_free(BPyGPUUniformBuf *self)
{
BPYGPU_UNIFORMBUF_CHECK_OBJ(self);
GPU_uniformbuf_free(self->ubo);
self->ubo = NULL;
Py_RETURN_NONE;
}
#endif
static void BPyGPUUniformBuf__tp_dealloc(BPyGPUUniformBuf *self)
{
if (self->ubo) {
GPU_uniformbuf_free(self->ubo);
}
Py_TYPE(self)->tp_free((PyObject *)self);
}
static PyGetSetDef pygpu_uniformbuffer__tp_getseters[] = {
{NULL, NULL, NULL, NULL, NULL} /* Sentinel */
};
static struct PyMethodDef pygpu_uniformbuffer__tp_methods[] = {
{"update", (PyCFunction)pygpu_uniformbuffer_update, METH_O, pygpu_uniformbuffer_update_doc},
#ifdef BPYGPU_USE_GPUOBJ_FREE_METHOD
{"free", (PyCFunction)pygpu_uniformbuffer_free, METH_NOARGS, pygpu_uniformbuffer_free_doc},
#endif
{NULL, NULL, 0, NULL},
};
PyDoc_STRVAR(pygpu_uniformbuffer__tp_doc,
".. class:: GPUUniformBuf(data)\n"
"\n"
" This object gives access to off uniform buffers.\n"
"\n"
" :arg data: Data to fill the buffer.\n"
" :type data: object exposing buffer interface\n");
PyTypeObject BPyGPUUniformBuf_Type = {
PyVarObject_HEAD_INIT(NULL, 0).tp_name = "GPUUniformBuf",
.tp_basicsize = sizeof(BPyGPUUniformBuf),
.tp_dealloc = (destructor)BPyGPUUniformBuf__tp_dealloc,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_doc = pygpu_uniformbuffer__tp_doc,
.tp_methods = pygpu_uniformbuffer__tp_methods,
.tp_getset = pygpu_uniformbuffer__tp_getseters,
.tp_new = pygpu_uniformbuffer__tp_new,
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Public API
* \{ */
PyObject *BPyGPUUniformBuf_CreatePyObject(GPUUniformBuf *ubo)
{
BPyGPUUniformBuf *self;
self = PyObject_New(BPyGPUUniformBuf, &BPyGPUUniformBuf_Type);
self->ubo = ubo;
return (PyObject *)self;
}
/** \} */
#undef BPYGPU_UNIFORMBUF_CHECK_OBJ
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